Waveguide, and device and detection method using the same

a waveguide and detection method technology, applied in the field of waveguides, can solve the problems of undesirable optical fiber waveguides and difficult to make the device constitution small, and achieve the effect of low dispersion propagation characteristics and simple detection of physical properties of specimens

Inactive Publication Date: 2010-07-20
CANON KK
View PDF19 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a waveguide for detecting physical properties of a specimen. The waveguide has a single line made of a conductive body that can propagate an electromagnetic wave and a dielectric member that covers the single line and has a gap for detecting the physical properties of the specimen. This waveguide has low dispersion propagation characteristics and can easily detect the physical properties of the specimen by inserting it into the gap. The invention also provides a device and a method for detecting physical properties of a specimen using the waveguide.

Problems solved by technology

For this reason, such optical fiber waveguide is undesirable as a waveguide for propagating the terahertz wave.
Further, in the specimen inspection device disclosed by Japanese Patent Application Laid-Open No. 2001-174406, it is difficult to make the device constitution small, because the optical fiber waveguides need to be arranged so as to face with each other, and an external mechanism for such arrangement is needed.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Waveguide, and device and detection method using the same
  • Waveguide, and device and detection method using the same
  • Waveguide, and device and detection method using the same

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0067]In the present embodiment, there is described a constitution example in which gap portions in a waveguide are periodically arranged. As shown in FIG. 9, a waveguide according to the present embodiment is constituted by a single line 101, a dielectric member 102, and a gap portion 901. As shown in FIG. 9, in the gap portion 901, gaps are periodically arranged. With such arrangement, the refractive index of the substance constituting the dielectric member 102 and the refractive index of the gap portion 901 are periodically changed. As a result, the waveguide according to the present embodiment has the wavelength selectivity resulting from a photonic band gap in the gap portion 901.

[0068]In the sensor device for measuring physical properties of a specimen, according to the present embodiment, the physical properties of the specimen are detected on the basis of the change in the wavelength selectivity.

[0069]In the present embodiment, a gold wire is used as the single line 101. Hig...

embodiment 2

[0076]In the present embodiment, a constitution example in which the gap portions of the waveguide are self-similarly arranged is described. As shown in FIG. 11, the waveguide according to the present embodiment is constituted by a single line 101, a dielectric member 102 and gap portions 1101. As shown in the figure, the gap portions 1101 are self-similarly arranged. In the case of the present embodiment, the dielectric member 102 in the region corresponding to the gap portion 1101 is equally divided into three portions, and the central dielectric is left (which is referred to as one stage). The same procedure is repeated three times for each dielectric on both sides of the central dielectric, whereby, a structure (photonic fractal structure of three stages) is obtained. With this arrangement, a constitution in which the refractive index of the substance constituting the dielectric member 102 and the refractive index of the gap portion 1101 are self-similarly changed is obtained. A...

embodiment 3

[0083]In the present embodiment, there is described a constitution example in which the gap portions of the waveguide are periodically arranged and an element for disturbing the periodicity is provided for a part of the periodically arranged gap portions. As shown in FIG. 12, the waveguide according to the present embodiment is constituted by a single line 101, a dielectric member 102, and gap portions 1201. As shown in the figure, the element for disturbing the periodicity of the gap portion 1201 is constituted by filling, with the dielectric member 102, a gap in a part of the periodic gap arrangement as described in Embodiment 1. However, the method for disturbing the periodicity is not limited to the method. For example, a method of filling a part of the gaps with a material different from the material constituting the dielectric member 102 is conceivable. Further, a method of disturbing the periodicity of the gap by changing the thickness of the member constituting the gap porti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
frequencyaaaaaaaaaa
frequency bandaaaaaaaaaa
conductivityaaaaaaaaaa
Login to View More

Abstract

A waveguide includes a single line formed by a conductive material for propagating an electromagnetic wave including at least a part of a frequency band of 30 GHz or more and 30 THz or less, a first dielectric member covering the single line, and a second dielectric member covering the single line. A gap is provided between the first dielectric member and the second dielectric member. The electromagnetic wave which propagates from the single line covered by the first dielectric member to the single line covered by the second dielectric member, when propagating through the single line at the gap, is interactable with a specimen to be disposed at the gap.

Description

TECHNICAL FIELD[0001]The present invention relates to a waveguide technique for propagating electromagnetic waves in a region from the millimeter wave to the terahertz wave. Further, the present invention relates to an inspection device which performs analysis and identification of physical properties of a specimen by using the electromagnetic waves in the region from the millimeter wave to the terahertz wave.BACKGROUND ART[0002]In recent years, a non-destructive inspection technique using a high frequency electromagnetic wave (hereinafter refer to as “terahertz wave”) having an arbitrary band in the region from the millimeter wave to the terahertz wave (from 30 GHz to 30 THz) has been developed. It is known that there exist many absorption lines of various substances including biomolecules in the terahertz wave region. Therefore, as an application field of this frequency region, there is a technique for performing the imaging as a safe fluoroscopic inspection device, instead of the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(United States)
IPC IPC(8): G01R27/04G01R27/32G01N21/35G01N21/3581G01N22/00
CPCG01N21/3581G01N21/774G01N21/3504G01N21/3563G01N21/3577G01N2021/7736G01N2021/7776G01N21/77G01N21/00
InventorITSUJI, TAKEAKI
OwnerCANON KK